Comparison between a polyacrylamide and a hydrophobically modified polyacrylamide flood in a sandstone core

Maia, Ana M. S.; Borsali, Rédouane; Balaban, Rosângela de Carvalho

doi:10.1016/j.msec.2008.09.018

Cited by 87 publications

(47 citation statements)

References 16 publications

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“…The possibility exists to introduce responsive behavior to parameters such as pH [3][4][5], temperature [6,7] or UV irradiation [2]. The versatility in properties has resulted in an increased attention in the last decades for application in several fields including smart materials [6,7], micro emulsion stabilization [8] and polymerization [9,10], coatings [11], drug delivery [12][13][14] and enhanced oil recovery [2,3,15,16].…”

Section: Introductionmentioning

confidence: 99%

Triblock copolymers of styrene and sodium methacrylate as smart materials: synthesis and rheological characterization

Meijerink

Mastrigt

Franken³

et al. 2017

Pure and Applied Chemistry

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Well-defined amphiphilic triblock poly(sodium methacrylate)-polystyrene-poly(sodium methacrylate) (PMAA-b-PS-b-PMAA) copolymers characterized by a different length of either the hydrophilic or the hydrophobic block have been synthesized by ATRP. In solution the micelle-like aggregates consist of a collapsed PS core surrounded by stretched charged PMAA chains. The micelles are kinetically 'frozen' and as a consequence the triblock copolymers do not show a significant surface activity. The hydrophilic block length has a major influence on the rheology, the shortest PMAA blocks yielding the strongest gels (at the same total weight concentration). The hydrophobic block length has only a minor influence until a certain threshold, below which the hydrophobic interactions are too weak resulting in weak gels. A mathematical model is used to describe the micelle radius and the results were in good agreement with the experimentally found radius in transmission electron microscopy. The influences of the ionic strength, pH and temperature on the rheology has also been investigated, showing the potential of these polymers as smart hydrogels. The change in conformation of the hydrophilic corona from the collapsed state to the stretched state by changing the pH was quantified with zeta-potential measurements. To the best of our knowledge, this is the first systematic investigation of this kind of triblock copolymers in terms of their rheological behavior in water.

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Section: Introductionmentioning

confidence: 99%

Triblock copolymers of styrene and sodium methacrylate as smart materials: synthesis and rheological characterization

Meijerink

Mastrigt

Franken³

et al. 2017

Pure and Applied Chemistry

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“…The mobility control ability of polymer was characterized by resistance factor (RF) and residual resistance factor (RRF). The RF and the RRF were calculated by the following equations [22,27]:…”

Section: Mobility Control Capacitymentioning

confidence: 99%

Shear Resistance Properties of Modified Nano-SiO2/AA/AM Copolymer Oil Displacement Agent

et al. 2016

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Abstract:To address the problem regarding poor shear resistance of commonly employed polymers for oil displacement, modified nano-SiO 2 /AA/AM copolymer (HPMNS) oil displacement agents were synthesized using acrylic acid (AA), acrylamide (AM), and modified nano-SiO 2 of different modification degrees as raw materials. HPMNS was characterized by means of infrared spectroscopy (IR), nuclear magnetic resonance ( 1 H-NMR, 13 C-NMR), dynamic/static light scattering, and scanning electron microscope. A comparative study of the shear resistance properties for partially hydrolyzed polyacrylamide (HPAM) and HPMNS was conducted. Compared to HPAM, the introduced hyperbranched structure endowed HPMNS with good shear resistance, which was quantified from the viscosity retention ratio of the polymer solutions. From the perspective of rheological property, HPMNS also showed great shear stability after shearing by a Mixing Speed Governor and porous media shear model. Furthermore, with a higher degree of modification, HPMNS-2 had better shear stability in terms of viscosity and rheological property than HPMNS-1. The phenomena were due to its lower hydrodynamic radius, weight-average molecular weight, and better flexibility of its molecular chains. In addition, upon the indoor displacement test, the resistance factor and residual resistance factor values of HPMNS-2 were higher than those of HPAM. This behavior is beneficial for increasing oil recovery.

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“…More recent works have also suggested the existence of bridging adsorption phenomena [48] on the pore throats walls. Regarding HMWSP flow in porous media, much fewer references can be found, but the available results [49,50] indicate significantly higher injection pressures for HMWSP than for corresponding WSP, which are attributed to higher adsorption for HMWSP. Such interpretations are consistent with HMWSP adsorption studies performed under static conditions, which have shown that adsorption isotherms do not tend to a plateau when increasing polymer concentration [51][52][53].…”

Section: Nomenclaturementioning

confidence: 99%

Hydrophobically Modified Sulfonated Polyacrylamides for IOR: Correlations between Associative Behavior and Injectivity in the Diluted Regime

Dupuis

Rousseau

Tabary

et al. 2012

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Comparison between a polyacrylamide and a hydrophobically modified polyacrylamide flood in a sandstone core

Cited by 87 publications

References 16 publications

Triblock copolymers of styrene and sodium methacrylate as smart materials: synthesis and rheological characterization

Triblock copolymers of styrene and sodium methacrylate as smart materials: synthesis and rheological characterization

Shear Resistance Properties of Modified Nano-SiO2/AA/AM Copolymer Oil Displacement Agent

Hydrophobically Modified Sulfonated Polyacrylamides for IOR: Correlations between Associative Behavior and Injectivity in the Diluted Regime

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